浮気（ふわき）的英語名言有：
1. "One should be faithful not because it's the right thing to do, but because it's convenient."
2. "Love without jealousy is unnatural."
3. "If you love someone, you'll always have doubts. But that's life, after all."
4. "One's love is not something to boast of, but rather a secret that should be kept."
5. "When you start to doubt yourself, you are already lost."
這些名言表達了感情中的不忠和不確定性。但請注意，這些只是一些浮気的英語名言，不一定完全符合您的意思。